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1. Simple Harmonic Motion/Wave Motion

Hi, I need to find the frequency, amplitude, and period for the motion of a particle whose distance s from the origin is the given function. s= 2sin2tcos2t. This is what I came up with, can someone please tell me if I am doing this correctly. sin2t = 2sintcost s = sin4t A= 1...
2. Electromagnetic Waves Problem

Hi, Can someone help me on the following problem: Suppose you are located 180 m from a radio transmitter. How many wavelengths are you from the transmitter if the station calls itself 1147 AM? (The AM band frequencies are in kilohertz.) I have used the following equation to find the...
3. Heat/Temperature Physics Problem

Hi, Can someone please tell me what I am doing wrong with the following problem. The computer keeps telling me that I am coming up with the wrong answer. In a constant-volume gas thermmoeter, the pressure at 18.0 C is 0.980 atm. What is the pressure at 42.0 C? I am using the equation...
4. Physics Problem: Sound Waves

Hi, Can someone please help me with the following problem: Standing at a crosswalk, you hear a frequency of 560 Hz from the siren of an approaching ambulance. After the ambulance passes, the observed frequency of the siren is 480 Hz. Determine the ambulance's speed from these observations.